Ice-machine



(No Modei.) 2 Sheets-Sheet 1.

s. LUSGHER.

IUE MACHINE. No. 329,842. Patented Nov. 3, 1885.

WITNESSES INVENTOR 4%? 1392.: i I J BY ATTORNEYS.

(No Model.) 2 Sheets-Sheet 2.

S. LUSOHER ICE MACHINE.

No. 329,842. Patented Nov. 3, 1885.

r H r i N Q 1 f N 5 I [v Q L U K} j WITNESSES: 1 fY -.'jf; INVENTOR: ZW JQZMW mipgw I BY ATTORNEYS.

UNITED STATES PATENT OFFICEo SIGMUND LUSOHER, OF FRANKFORT, KENTUCKY.

ICE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 329,842, dated November 3, 1885.

Application filed November 19, 1884. Serial No. 148,300. (No model.)

To all whom it may concern:

Be it known that I,SIG1\IUND LUSOHER, of Frankfort, in the county of Franklin and State of Kentucky, have invented a new and Improved Ice-Machine, of which the following is a full, clear, and exact description.

My improvements relate to the class of machines which use ammonia as the refrigerating medium. In these machines it has been heretofore usual to introduce the ammonia from a still directly to coils in the cooling-tank,with

the result of a constant back-pressure in the absorber of from twenty-five to thirty-five pounds,which prevents the gas from expanding freely, thus preventing its complete absorption by the liquid.

The object of my invention is to overcome thisdifficulty; and to that end it consists in a novel means for connecting the return-gas pipe from the brine-tank to the coils, whereby the gas is caused to be almost entirely absorbed by the weak ammonia, and the backpressure is kept down to a very low point.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is an end elevation of my machine with a portion of the refrigerating-tank broken away. Fig. 2 is a side elevation of the same. Fig. 3 is a detail view in larger size.

A is the coiling-tank, B the absorber, provided with the distributing-water trough a. and waste-water trough b, as usual. 0 is the pipe leading the weak ammonia from the receiver WV, connected to the still, to the absorber B. d is the return-gas pipe from the refrigeratingtank e, leading to the lower pipe of the absorber B. f is the ammonia-gas pipe extending from the still, said pipe f connecting with condensing pipe-coils m, extending into the cooling-tank A. g is a pipe connecting with the refrigerating-tank e, and with the receiver 0, Fig. 2, having connection with the condensing pipe-coils m of the cooling-tank A by means of the pipe n. The two pipes 0 (Z are connected to the lower coil of the absorber, as shown in Figs. 1 and 3, the weak-ammonia pipe 0 entering near the end of the lower coil, while the return-gas pipe d passes in at the end, and extends beyond the pipe 0 a suitable distance, so that the gas is discharged at a point in advance of where the weak ammonia enters, thus forming an injector by which the weak ammonia is drawn in,with the result of almost a complete absorption of the gas, and a reduction of the gas and a reduction of the pressure to a very low point. This mixing of the return gas and weak ammonia before reaching the absorber proper makes the ammonia strong when it is pumped into the still for redistillation, and the pressure being kept down the gas expands freely through the coil of the brine-tank, thus adding to the efficiency of the machine, all of which will be more fully explained hereinafter. The upper coils of the absorber B are made of smaller size than the lower ones, as shown in Fig. 1. This also aids the complete absortion of the gas.

The operation is as follows: The ammonia is pumped from apipe, 15, (per dotted lines, Fig. 2,) through a pipe, h, into the stand-pipe p, and into the pipes or tubes of the still, being passed through the remaining tubes by end pipe-connections, as seen in dotted and full lines of Fig. 1, and from there into the receiver w as weak ammonia. While in the said tubes the ammonia is heated by steam, (provision in practice being made therefor,) generating a hot vapor of ammonia, which flows through the stand-pipe 19 into the pipe f, conveying it into the condensing pipe-coils m of the cooling-tank A, converting it into anhydrous ammonia. From these condensers or pipe-coils m it flows through the pipe a into the receiver 0, Fig. 2, whence it is fed or expanded through pipe 9 into the refrigerating-tank 0. After expanding and performing its work in the tank 6 it is returned as gas through the pipe d into the cooling coil or absorber B, as before stated, in advance of the weak ammonia, as will be understood from Fig. 3. From the receiver w, Fig. 1, the weak ammonia is conveyed through pipe 0 into pipe 3 or absorber, as also previously stated. The weak ammonia and return gas, after discharging into the coolingabsorber B, commingle in their upward passage through the coils, at which time also the return gas is absorbed by the weak ammonia by the aid of cold water from the trough a, the water being designed to be distributed over both sides of the coils or pipes by thin vertical strips of wood fitted in tightly between and reaching from the bottom of one pipe down to the top of the next pipe, and so on. The vapor or ammonia now passes through the pipe is as strong ammonia into the original abso ber m in the cooling-tank A, whence it is pumped from pipe Z through suction-pipej into pipe h, into stand-pipe p, and

into the still, where it is redistilled continuadvantage of the commingling of the return gas and weak ammonia at the conjunction of pipes c and d is that the gas greatly assists in cooling the hot ammonia.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an ice-n1achine, the connection of the wealra nmonia pipe from the still and the return-gas pipe from the refrigerating-tank to the absorber, substantially in the manner described, which consists in the extension of the gaspipe beyond the point of connection of the ammonia-pipe, so as to compel the more complete absorption of the gas, as set forth.

2. In an ice-machine, the combinatiomwith the ammonia-still pipes, of the ammonia-"apor conduit or pipe connectingwith a pump, and the hot ammonia-vapor stand-pipe connecting with the condensing pipe-coils of the cooling-tank, substantially as and for the purpose set forth.

3. In an ice-machine, the combination, with condensing pipe-coils,and a pipe leading from said condensing pipe-coils to a receiver having pipe-connection With the refrigerating-tank, substantially as and for the purpose set forth.

4. In an ice-machine, thecombination, with the ammonia-still pipes, of the ammonia conduit or pipe connecting with the still-pipes and a source of supply, the pipe connecting with the ammonia-vapor stand-pipe and the condensing pipecoils, a pipe leading from condensing pipe-coils to a receiver having pipe-connection with the refrigerating-tank, and the absorber connecting by pipe with the refrigerating-tank, substantially as, and for the purpose set forth.

5 In an ice-machine, the combination, with the ammonia-still pipes, of the ammonia pipe or conduit connecting with the still-pipes and a source of supply, the pipe connecting with the ammonia-vapor stand-pipe and the conn pipe- 1s, pip ea g rom th condensing pipe-coils to a receiver. having pipe-connection with the refrigerating-tank,

the absorber connecting by pipe with the refrigerating-tank, and a pipe connecting the said absorber with a second absorber, said latter pi pc having suction-pipe connection with the aforesaid standpipe, substantially as set forth.

SIGMUN D LUSGHER.

Witn esscs HERMANN KIRGHHOFF, GEo. JAGAL. 

